One day the great Greek philosopher Socrates (469 – 399 BC) came upon an acquaintance who ran up to him excitedly and said, “Socrates, do you know what I just heard about one of your students?”
“Wait a moment,” Socrates replied. “Before you tell me I’d like you to pass a little test. It’s called the Test of Three.”
“Three?”, exclaimed the student.
“That’s right,” Socrates continued. “Before you talk to me about my student let’s take a moment to test what you’re going to say. The first test is Truth. Have you made absolutely sure that what you are about to tell me is true?”
“Oh no,” the man said, “actually I just heard about it.” […]